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O. SCHULZ.

CONTINUOUS EVAPORATING APPARATUS. No. 463,338. Patented Nov. 17,1891..

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(No Model.) 3 Sheets-Sheet 2.

. 0. SCHULZ. CONTINUOUS EVAPORATING APPARATUS.

No. 463,338.- Patented Nov. 17,1891.

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(No Model.) 3 Sheets-Sheet 3.

O. SCHULZ. CONTINUOUS PVAPU'PATING APPARATUS. No. 433,333. Patented NW1?, 1391.

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UNITED STATES PATENT OFFICE.

OTT() SCHULZ, OF BRIEG, GERMANY.

CONTINUOUS-E'VAPORATING APPARATUS.l

SPECIFICATION forming part of Letters Patent No. 463,338, dated November 17, 1891.

Application filed December 19, 1890. Serial No. 375,251. (No model.)

To all whom t puny con( cm:

. Be it known that I, OTTO SCHULZ, inspector, of Brieg, in the Kingdom of Prussia and German Empire,haveinventednew and usefulImprovements in Continuous-Evaporating Apparatus, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in continuous-evaporating apparatus.

In. evaporating apparatus such as at present 1n common use, and in which the juice, sirup, or other liquid to be evaporated is contained in comparatively deep vessels, a considerable amount of heat is required because of the depth of the liquid, and the steam bubbles which are produced, and Vwhich pass through the fluid, carry with them an appreciable quantity of the fluid in afinely-'divided condition. A loss of iiuid consequently follows, accompanied with a considerable waste of heating effect. Further, the qualit-y of the sirup, juice, or other fiuid to be evapo-v rated is materially deteriorated, particularly in the case of the concentration of beet-juice in the manufacture of beet-root sugar.

It is the object of this invention to remove the objections to which reference has just been made as being incidental to a process of evaporation in present common use. Y

I will describe my improvements with reference to the accompanying drawings, in which- FigureI represents a cross-section. Fig. II 1s a side view with the side of the casing removed. Fig. III is a plan of the apparatus with the upper part of the casing removed. Fig. IV is a front view of the arrangement for opening and closing the outlets of the evaporating-pans. Fig.Vis a cross-section of Fig. IV, and Fig. VI is a view of one forni of detachable coupling.

The apparatus consists of a series of pans arranged one above the other, and so that the ends of alternate pans project .beyond the others, as shown in Fig. II. The pans are inclosed by and within the casing H, which may be provided with a steam-dome, gages, manometers, air-cocks, and other usual fittings.

The evaporating-pans are supported upon rollers A, the spindles of which are mounted in the brackets B, preferably carried on the side supportingfpillars o o within the casing. Upon the evaporating-pans ato a6 there are secured the rims b to b, which may be suitably formed from angle-iron, and which hold between them and the upper edges or flanges of the pansiiat or corrugated plates c by their edges, as shown in Figs. I and II. These plates should not be arranged quite horizontally, but with a slight inclination in a direction to facilitate the iiow of the liquid to be evaporated or concentrated, and if corrugated plates are used it is preferred that the corrugations should gradually flatten out to a plain surface at the outlet ends of the pans.

In operation-thej uice or other fluid is evaporated or concentrated on the corrugated or plain surfaces c, the necessary heat being obtained from live steam admitted to theinteriors of the pans below the plates: The steam may be supplied to the pans by means of a pipe C, which opens into a branch pipe D, from which separate pipes d lead the steam to the steam-chambers of the pan. The pipes d are'connected to the pans by detachable couplings, such as that shown in Fig. VI. The steam-chambers are desirably provided with bafie-plates, as indicated by Fig, III, so that the steam takes the course indicated by the arrow, and finally. escapes from the pan by the outlet E.

The juice, Sirup, or fiuid to be evaporated is led to the pans bythe pipe F, so that the fluid flowing therefrom falls upon the higher part of the plain or corrugated plate c of the upper pan. At the lower end of each pan there is constructed in the rim a sluice or passage through which the fluid may flow into the next lower pan, and from the lowest pan into a gutter or upon the bottom of the casing. The passage from each pan may be closed and opened by means of a sliding door d, Figs. IV and V. These doors move between guides f, and each one is connected with a rack g, which is also guided in a suitable manner, and with which gears the worm 1l, the latter being actuated by means of a hand-wheel outside the casing.

The upper edges of the doors d are lower than the top edges of the rims, so that the overfiow of the fluid may occur at this point.

IOO

v be evaporated or concentrated is led by the pipes F to the upper-pan, upon which it becomes heated and from which it flows to the nent lower pan, Whereit is further heated, and so 1n succession over the series of pans, and, iinally, it may flow upon the floor of the caslng, whence it can escape by the outlet m, which may be controlled by a valve or other means, so as to make the outiiow continuous or intermittent, as may be desired.

One of the Walls of the casing is preferably constructed and arranged so that it may be readily removed to allow the pans to be withdrawn by the hooks r when necessary and in order t0 allow greater facility for repairing and cleaning. On the opposite Walls of the casing a man-hole may be provided.

VlVithout limiting,r myself to the precise construction and arrangement of parts shown and described, I claim- 1. In an evaporating apparatus, the combination of a casing, a series of sets of rollers mounted upon supports within the casing, and a series of evaporating-pans removably supported upon the rollers and provided with steam-chambers, and steam-pipes detachably connected to said steam-chambers, substantially as described.

2. An evaporating apparatus consisting of a casing having rollers carried by supportingpillars Within the casing, a series ot pans supported upon the rollers, said pans having corrugated bottoms, steam-chambers beneath the bottoms, and end-gates for regulating the dis charge of liquids to be evaporated, and steampipes detachably connected to the pans, Whereby the pans may be easily removed and replaced, substantially as described.

In Witness whereof I have hereunto set my hand in presence of two witnesses.

OTTO SCHULZ. Witnesses:

HERRMANN PIETSCHMANS, WILLIAM H. MUssELMAN. 

